Transformer winding



. 1,641,272 Sept. 6., 1927- 5, HORELI'CK TRANSFORMER WINDING Filed Dec. 20, 1925 @ff y *Patented Sept. 6, 1927.

` UNITED STATES SAMUEL HORELICK, F PITTSBURGH,

TRANSFOBMER COMPANY, A

PENNSYLVANIA, ASSIGNOR T0 PITTSBURGH CORPORATION OF PENNSYLVANIA. i

TRANSFORMER WINDING.

Application filed December 20, 1923. Serial No. 681,716.

therethrough of a cooling and insulating medium, such as oil.

Among the objects of my invention are t0 provide a transformer having coils which are securely held and supported by the transformer core, which coils are themselves strong and rigid, cheaply and easily constructed, are formed with passages particularly adapted to facilitate thefree passage therethrough of the cooling and insulating means and in which the windings are well insulated from one another and from adjacent met'al parts.

Numerous other objects and advantages will appear from the following description taken in connection with the accompanying drawing wherein Fig. 1 shows the vertical section of a transformer embodying one form of my invention, the said section being taken on the lines 1-1 of Fig. 2.

Fig., 2 'shows a horizontal section taken on the line 2-2 of Fig. 1.

Fig. 3 is a fragmentary perspective view showing a portion of one end of the coil.

The transformer shown is adapted to be supported in a tank containing oil. Referring to Figs. 1 and 2 of the drawing, 10 represents the core of the transformer formed with an inner leg 11, outer legs 12 and connecting portions 13 and 14. Surrounding the inner leg 11 of the transformer is a sheet of insulating material 15 and about this insulating material are placed a series of suitably treated wooden sticks or rods 16 spaced apart so as to ermit the flow of oil between the same. urs

rounding these sticks is a second layer ofv ino sulating material 17 which terminates at 18 leaving spaces 19 above and below the layer. The first layer of coil 20 of the low potentia winding of the transformer is wound around the insulating material 17. Surrounding the coil 2() is a second series of sticks which are likewise spaced as shown in Fig. 2 and terminate flush with vthesticks 16. Around this second series of sticks is wound asecond layer of insulating material and this structure consisting of successive layers of insulatin continue outwardly to the "end of the low each layer of the high y winding.

materlal, winding and sticks is potential Winding. There then follows a series of alternate' insulating sheets 21 and sticks 22 which serve as spacing and insulating means between the high and low potential windings. The insulating sheets 21 terminate flush with the sticks 16 while the sticks 22 terminate at 23 leaving spaces 24 above and ybelow these sticks 22. Around the last or outer sheet 2l of this series is wound the first layer or coil 25 of the high potential winding. This coil does not extend up and down as far as the coils of low potential winding and rings 26 of insulating material are placed above and below otentialv windings in the manner shown. ticks 27 located between the connecting portions 13and 14 of the core 10 and which form a portion of the spacing means for the high potential windings have their ends flush with the sticks 16. Sticks 28, however; which space the coils of the high potential winding and are located laterally of the connecting portions 13 and 14 of the core are shorter than the sticks 16 and 22 thus leaving spaces '30 above and below the high potential windings. The high potential windings are insulated and spaced from the outer legs of the core by alternate layers of sticks 31 and insulating layers 32. The last row or rows of the sticks 31 and layers of insulatingmaterial 33 extend upwardly and downwardly so as to be flush with the sticks 16 all around the The general arrangement vof sticks is shown in Fig. 2 and between adjacent rows of sticks 16, 27 and 31, at the end of the sticks are wedged flexiblespacers 35 to brace the stick structure. During the treatment of thel coil the sticks and spacers become glued together.

Between the ends of lthe sticks 16 and the connecting portions 13 and 14 of the core is placed insulating material 37 which may be formed of sheets of fibre.

from the core as wel as other metal parts there is placeda series of insulating strips 38, one end of each strip being inserted between adjacent layers of insulating material 21 while the remainder of each strip lies between the ends of the sticks 27 and 31 and the connecting portions 13 and 14 of the transformer core.

The coil shown in Figs. 1 and 2 is wound fon a suitable form or mandrel land sticks As a means Y l for insulating the high potential windings `are employed which are somewhat longer I. than the sticks shown in Fig. 1. When the tightly;

.winding has been 'completed sticks 31. and

16 are sawed or Acut olf by a single operation to their required length. This vmethod of manufacture insures that these sticks shallthe coil. lThis core is built up of intertting sheet metal laminations which are forced against the coil or coilsso as to sulpe same firmly in' position. When t port t p ortions 13 Iand 14 are forced connecting tightlyV "against the ends of the coil' ,the

'passages adjacent their ends perpendicularf to the rst'. mentioned passages.

.fand supported onthe stick structure.

fluid through insulatingstrips 37 and 38 are tightly com pressed and the.,windings are rigidly'held By extending the sticks beyond the coil insula4 tion lthe passages between the sticks are open' 'at both ends vso as to permitv the free' circulation of oil through these pasages and out into the space around the transformer.

I claim:

1. In a transformer a core formed with a winding receiving space, a winding comprising -coils held in saidspace, and a supporting structure for said, winding comprising a series of separated spacers, there being circulating passages between said spacers terminating in said space, which passages are-2 substantially the length of said space and are open at both' ends. Y, I 2. In a transformer, a. core. formed With a winding receiving space, windings comprising'coils held in said space, insulating partitions' and a series of'separated spacers Y.

between the coils, said insulating partitions and spacers forming open passages for the r circulation Yof iuid therethrough,'said` passages terminating in. said-space and open at both ends permitting circulation of said said -receiving space of said core. v f

3. Ina transformer, windings comprising coils, insulating partitions and separated spacing sticks between said coils, said sticks serving to support Ysaid winding and to form circulating passages parallel thereto Y and 4 In a stationary induction apparatus, a series of concentric coils, insulating sheets and sheets formin and spacing rods between said coils, said rods extending beyond saidA coils and sheets and terminating flush with substantially. parallel planes, and supporting means, for said. coils positioned in contact with and covering the ends of said rods, said rods passages through said coils, and said ro s formin an open columnarstructure beyond sai coilswhereby cooling fluid.l may freely pass through said coils and into the space outside sai ratus;

5. A transformer having a core .formed with an opening and a Winding on said core supported in said vopening by spaced rods extending through said winding and of substantially the length ofsaid opening there being open passages through said windings between saidrods and openings adjacent the ends of, said rods extending through the opening of said core.

6. A transformer having' a core formed with an opening and a winding on said core and supported in said opening by a structure comprising spaced rods vextending through said winding and of substantially the length of saidopening-and bracing means between said rods adjacent their ends there being open passages through said winding between said rods.

`7. A transformer having a core formed with an opening and a winding onl said core appa.-

comprisingspaced rods extending through said winding and of substantially the length of said opening and bracing means between said rods adjacent their ends-being passages in .said opening through said winding btween said rods, sai'dpassages. being 'freely open at their ends.

8. 'A transformer havin a core formed' with an opening and a win ing on said core and supported in said opening, saidwinding being formed of successive colls, spacin rods and insulating sheets, certain of sai rodsr being located inside said opening and beingl extended beyond said coils and sheetsV forming circulating passages between` said rods extending crosswisefrom the windings of the coils and circulating passa es `at both' neral v ends-of said lrods extending in t e direction of the windings of the coils and passing through the opening of said core;

SAMUEL HOREL'VICK;

CERTIFICATE oF CORRECTION.

PotentV No. 1,641,272.'

SAMUEL HORTLTCK.

. -I't is hereby certified Vthat lCTroT ppeorsin the printedspecification of th labove` numbred patent requiring 7, after the wox 'd "ends" insert a coa andthe word there"; .and thot the said Letters Patent A:should be read with this correction therein that the same may conform to the rocordof the caso in the Pateni: Office.

"Signed and s'elled this4 11th day of) October, A. D. 1927.

M.y i. Moore; Acting Commissioner of Patento.

' Granted spfmber 61, 1927, to

Correction as follows: Page 2,l line 92, Claim 

